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Sikaflex-291 is a professional-grade, fast-curing polyurethane adhesive and sealant designed for marine and industrial use. It offers superior adhesion to multiple surfaces including gelcoat, fiberglass, metal, and wood, with excellent resistance to water, chemicals, and fuels. Suitable for above and below waterline applications, it provides durable, vibration-resistant seals that are NSF and USDA approved, making it a trusted choice for boat builders and maintenance experts.










| ASIN | B01GPIXX5Y |
| Best Sellers Rank | #48,711 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #32 in Adhesive Caulk |
| Brand | SIKA |
| Brand Name | SIKA |
| Colour | White |
| Compatible Material | Metal, Plastic, Wood |
| Container Type | Cartridge |
| Country of Publication | USA |
| Customer Reviews | 4.4 out of 5 stars 663 Reviews |
| Included Components | 10.1 fl oz Cartridge |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Type Name | Adhesive |
| Item Weight | 300 Grams |
| Manufacturer | Sika USA |
| Manufacturer Part Number | 90919 |
| Material | 1-C polyurethane |
| Material Type | 1-C polyurethane |
| Model | 90919 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Superior Performance and Versatility |
| Special Feature | Superior Performance and Versatility |
| Specific Uses For Product | Marine, Boat Maintenance and Repair |
| Tensile Strength | 260 Kips Per Square Inch |
| UPC | 033886005258 |
| Unit Count | 298.69 Milliliters |
| Viscosity Level | Medium to High |
| Volume | 10.1 Fluid Ounces |
| Water Resistance Level | Waterproof |
L**O
Very good
This is a very good product. It would probably stick to water. D
M**Y
Easy way to fix the rain sensor .
Works as advertised and is really easy to do. The hardest Part is to get the cover off from the Mirror assembly, but even that was easy. There is not much needed and with a 3 year Shelf life, you have enough left in the tubes to get it done again if needed. Great Product. I would recommend this over fixed gel pads that never will connect to the surfaces as this liquid is doing. Actually there was a gel pad installed before and it failed. Thatโs why I had to do this in the first place. Definitely recommend this product.
P**O
Works great for a fishing kayak sonar tranducer
I used this adhesive to bond a sonar transducer to the bottom of a fishing kayak after watching some helpful videos on You Tube, it does as advertised and created a strong bond and there is no signal interference whatsoever.I would suggest bonding and orienting the transducer while the kayak is in the water so you can match the actual depth and the reading on the sonar as it needs to be oriented perfectly.
W**L
As described
As advertised look forward to using in the spring.
J**.
Easy to apply and did the job
Use these to chalk around swimming pool vents while the water was low. Turned rock hard and still fine after a couple months.
Trustpilot
2 months ago
1 month ago